The device is an excavator with electric plug-in capability. An electric power source of conventional power or a generator is attached to an electric motor on the excavator by a power cord. The electric motor activates a hydraulic pump, which in turn opera...

The invention relates to an electrical machine (1) for selective operation as a transformer for an alternating voltage operation or as a choke system for a direct voltage operation. The electrical machine (1) comprises a transformer core (3) with two legs ...

Systems and methods to launch an aircraft are disclosed. In one embodiment, a system (100) comprises an electrically powered buoyant aircraft (110), a control system (130) to maneuver the aircraft and a tether (140) adapted to couple to the aircraft and to...

Disclosed herein is a train network system and method using a power line. The train network data communication system includes a TCMS control unit configured to send control commands to a PLC adaptor via the power line using FSK communication in order to p...

A method of controlling a neutral section operation of a train (14) including a lead locomotive (16) and at least one remote locomotive (12) in communication with the lead locomotive. The locomotives are electrically powered from respective electrical conn...

The device (20) has a HOC/HMC switch that switches between two states according to whether a roof cable conveys DC or single phase current. The switch connects the cable to a DC power line in one state, and insulates cable and sets the line to ground or to...

The train may collect direct current from an overhead wire (9). The input current (8) may flow through a smoothing circuit (10) to the DC side (2) of a pulse current inverter (1). The AC side (3) is connected to four motors (PSM1-4) in parallel. The motors...